<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8" />
    <title>Hello React!</title>
    <script src="https://cdn.staticfile.org/react/16.4.0/umd/react.development.js"></script>
    <script src="https://cdn.staticfile.org/react-dom/16.4.0/umd/react-dom.development.js"></script>
    <script src="https://cdn.staticfile.org/babel-standalone/6.26.0/babel.min.js"></script>
</head>

<body>

    <div id="app"></div>
    <script type="text/babel">
        class HelloState extends React.Component {
            constructor() {
                super();
                this.state = {
                    text: 'hello world'
                }
            }
            buttonClick = () => {
                this.setState({
                    text: 'hello didi'
                })
            }
            render() {
                return (
                    <div>
                        <h1>{this.state.text}</h1>
                        <button onClick={this.buttonClick} >点我试试</button>
                    </div>
                ); 
            }
        }
        ReactDOM.render(
            <HelloState />,
            document.getElementById('app')
        );
    </script>

</body>

</html>